Christie Brinkley had another awkward near run-in with her ex-husband Peter Cook at Sag Harbor restaurant Tutto il Giorno on Saturday night. Brinkley was dining on the terrace with daughter Alexa Ray Joel when Cook came in with his and Brinkley’s daughter, Sailor, and his girlfriend, Suzanne Shaw, and were seated nearby. A spy told us, “It was awkward. Christie seemed amused, and she and Alexa were looking over. Peter looked very uncomfortable. Later, Sailor went over to talk to her mother and sister, and Peter took his chance to leave without passing Christie, and snuck out through the back of the restaurant. But his girlfriend didn’t follow, and instead walked right past Christie’s table in a tight black dress. Christie deliberately didn’t notice, and just carried on talking to Sailor.” A rep for Brinkley declined to comment, and Cook could not be reached last night. The pair, who split in 2006 after revelations he had an affair with his assistant, had another near run-in last week at Sag Harbor’s American Hotel.